Pneumatic laying-off apparatus for cylinder printng-machines.



PATENTED DEC. 8, 1903.

W. M. ROOKSTROH. PNEUMATIG'LAYING-OFF APPARATUS FOR CYLINDER PRINTINGMACHINES.

APPLICATION FILED APR. 16. 1902.

2 SHEBTSSHEET 1.

N0 MODEL.

PATENTEDDEC. e, 1903.

W.. M. ROGKSTROH. PNEUMATIC LAYING-OFF APPARATUS FOR CYLINDER PRINTINGMACHINES.

APPLICATION FILED APR. 16. 1902.

2 SHEETS-SHEET 2.

NO MODEL.

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Patented December 8, 1903.

UNITED STATES PATENT OFFICE.

WILHELM MAX ROCKSTROH, OF KLEIN SEDLITZ, GERMANY.

PNEUMATIC LAYING-OFF APPARATUS FOR CYLINDER PRlNTlNG-MACHlNES.

SPECIFICATION forming part of Letters Patent No. 746,651, dated December1 Application filed April 16, 1902. Serial No. 108,216. (No model.)

To a whom it mag concern:

Be it known that I, Wt'LHELM MAX ROCK- STROI-I, factory manager, asubject of the Emperor of Germany, residing at Klein Sedlit-z, nearPirna a. E., in the German Empire,have invented certain new and usefulImprovements in Pneumatic Laying-Off Apparatus forCylinderPrinting-Machines, of which the following is a completespecification.

The invention relates to improvements in laying-off apparatus forcylinder printingmachines in which the paper sheets are secured on thecylinder by grippers during the printing operation and transferred tothe laying-ofl table while the cylinder is at rest, the printed papersheet being seized by a perforated cross-pipe under the action of airsucked through the perforations of said crosspipe, the latter beingadjustable to the length required of the paper sheets; and the objectsof the invention are, first, to provide special means for adjusting thepueu matic cross-pipe not only to the length, but also to the width ofthe paper sheets to be printed, and, second, to so arrange. thelaying-off apparatus as to enable the laying-off table to be placeddirectly beneath the laying on table and above the carriage travelingunder same, so that the length of the printing-machine is considerablyreduced as in comparison to machines of the other known constructions.

I attain these objects by the mechanism illustrated in the accompanyingdrawings, in which- Figure 1 is a side elevation of a part of a cylinderprinting-machine with the new laying-off apparatus. Fig. 2 is atransversal cross-section of the machine on the broken line U V W X Y Zin Fig. 1. Fig. 3 is a side elevation of a part of the laying-offapparatus on an enlarged scale. Fig. 4 is a sectional view of same ontheline S T in Fig. 3, and

Fig. 5 is a longitudinal section of a part of the pneumatic cross-pipeon an enlarged scale.

The new laying-0E apparatus essentially consists of a frame mounted torock with the axles b b in suitable bearings provided in the machineside frames. The said frame is comeither end of the shaft f a gear-wheelg is affixed, and at a certain distance therefrom a laying-off lever hisaffixed on the shaft f. The laying-off levers h h are preferably bentand provided with longitudinal recesses of a Tsection, wherein the headsof bolts 1; engage for adjusting the bearingsu of the axles of thepneumatic cross-pipe '5, according to the length of the paper sheets tobe printed. To facilitate this adjustment of the pneumatic cross-pipe'i, there is a shaft R arranged within the pipe 1', on whose ends arepinions i", which engage with segmental racks r, provided on the sidesof the levers h. The adjustment of the pipe t' on the toothed segment 1'is effected by turning the pinions 1' on the shaft R by the aid of asquare key. Thereby the pneumatic cross-pipe is always kept parallel tothe printing-cylinder m while being shifted in either direction. InFigs. 1- and 2 the pneumatic cross-pipe is shown as secured to the endsof the laying-off levers h h, while in Fig. 3 it is shown about in themiddle on the laying-01f levers. The gear-wheels g g engage in the twostraight racks Zak, which are mounted on the machine side frames at Ztoturn, while their toothed ends slide in suitable guides k, which arepivotally connected with the shaft f. As the axesb and l of the tubularside parts a a and the racks It is, respectively, are at a certaindistance from each other and on difierent heights, it will be understoodon an inspection of-Fig. 1 that during the movement of the laying-offframe from the position indicated by the full lines to the positionindicated by the dotted lines the shaftf will change its relativeposition with regard to the toothed ends of the racks It It. Theconsequence of this is that during the said movement of the laying-0Eframe the shaft f, with the laying-off levers h h, will be revolved bythe gear-wheels g g engaging in the racks k is, so that the layingofflevers h h, with the pneumatic cross-pipe 'i,will be swung and occupythe position above the laying-off table if, (indicated by the dottedlines. 7

It i immaterial for the present invention in what manner the laying-offframe should be actuated. In the drawings it is assumed that the oneside part aof the layingmlf frame pivotally connected with a forkedlever n, which by means of a pin and roller 0 engages the groove of acam-disk o. The latter is keyed on the principal shaft p of the machine.

The pneumatic cross-pipe dis employed for taking off the printed papersheet from the cylinder m. It is provided with a series ofsuetion-apertures 1', arranged at short equal distances from each other.The pneumatic pipe 1) is surrounded with a plurality of rings q, thenumber of which equals that of the suction-apertures t". The rings arearranged to turn on the pipe 2' and are held in their adjusted positionby the frictional contact with the pipe 2'. Each ring 9 is provided withan aperture, which by suitably turning the ring may be made to registerwith the corresponding suction-aperture t" of the pipe t'-- 1'. e., toopen it or to cover same. When the rings q are so adjusted that theirapertures correspond with the apertures of the pipe t, then said ringsmust be turned either to the left or right to close the apertures of thesaid pipe 2'. Thus by turning the several rings q in one or the otherdirection the pneumatic pipe 71 may be adjusted to the width of thepaper sheets to be printed, those suctionapertures i being left open oruncovered which are within the said width, while the other apertures arekept closed'or covered. The pneumatic cross-pipe t'may therefore beadapted to even the smallest width of the paper sheets which it willsafely take off the cylinder m. The pneumatic pipe 2' is in a knownmanner connected-With the one side part a of the laying-01f frame by ayielding india-rubber hose 8, and the side part a, itself is connectedby a yielding hose 3 with an air-suction pump. (Not shown in thedrawings.)

The new laying-off apparatus operates in the following manner: After theadjustment of the pneumatic cross-pipe t', in accordance with the lengthand the width of the paper sheets to be printed, the machine is put intooperation. On the completion of each printing operation and during thetime in which the cylinder mis at rest the lower edge of the paper sheetis sucked by the pneumatic crosspipe, the air-suction pump acting atthis moment. To insure the edge of the paper sheet being properly suckedby the pneumatic pipe, the groove of the cam-disk 0, which in thepresent instance is assumed to be employed, may be so shapedas to causethe pneumatic pipe 1} to bear for a short time against the edge of thepaper sheet and to suck it. Th6IB1 upon the laying-ofi frame is movedtoward the laying-off tablet, while the edge of the paper sheet is takenofi the cylinder m and carried forward by the pneumatic pipe '5, thendropped, the printed side of the paper sheet being turned upward. Duringthe swinging movement of the laying-oif levers h h the paper sheet isfirst lifted up and then, so to speak, rolled off the cylinder m withoutsliding on the surface of the latter, about as a gear-wheel is rolled onanother gear-wheel. As the paper sheet is very quickly layed off itwaves above the carriage toward thelaying-off table if and is thendropped, the airsuction pu mp ceasing at this moment to suck. A simpleand known device (not shown in the drawings)- may be employed forplacing each paper sheet in the exact position above the pile. The papersheets may be prevented from touching the types on-the carriage by aspecial protector placed above the traveling carriage.

In opposition to known constructions of the laying-off device where thepath of this device crosses with that of the device laying the papersheet on the cylinder the path of the new laying-off device does notcross that of the laying-on device at all, and so loss of time isavoided, since during the rest of the cylinder not only the printedsheet is taken off, but also a fresh sheet is layed on. It is obviousthat in consequence of this the speed of the printing-machine may beconsiderably increased without any disadvantage to the machine.

Having now particularly described and ascertained the nature of the saidinvention and in what manner the same'is to be performed, I declare thatwhat I claim is A pneumatic laying-off apparatus for cylinderpressescomprising oscillating levers, a suction-pipe carried thereby andprovided with apertures, and a series of rings adjustably mounted on thepipe and provided with apertures adapted to register with the aperturesof the suction-pipe, a shaft passing through the pipe, pinions on saidshaft and segmental racks carried by the arms and with which racks thesaid pinions engage.

In Witness whereof I have hereunto set my hand in presence of twoWitnesses.

WILHELM MAX ROOKSTROH.

Witnesses;

HERNANDO DE Sorro, PAUL AREAS.

ICC

